Question

In what ratio does sulphur and oxygen need to be added in order to increase the yield of SO₂ in the contact process?

• A. 1:2
• B. 2:1
• C. 3:2
• D. 4:3

Answer 1

The correct option is A

1:2

In the first stage of the contact process, sulphur is burnt to form SO₂. Here, the ratio of sulphur to oxygen is 1:2 where excess oxygen increases the yield of SO₂.